I always say the future of the Apple Watch will be built one app at a time, one year on, what are the killer apps for the smartwatch?

Apple Pay

This is the app I use the most on Apple Watch. I use it to pay for public transport; to buy groceries; at almost every shop; when I’m eating out or when I’m having a quiet drink with friends. Apple Pay on Apple Watch has save me at least twice when I’ve forgotten to bring cash with me. I think it’s great. The convenience and ease-of-use makes this a go-to solution, though I would like supermarket loyalty cards to be built into the exchange in some way. If you don’t use Apple Pay on the Watch yet, you really should. (Free).

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